Is this vulnerability remotely exploitable?

Yes. If an attacker can remotely influence the LLM's output (for example, through prompts, shared documents, or integrated data sources) and that output is rendered by `MarkdownRenderer.jsx`, the resulting HTML can execute in the browser of any user viewing that response.

Does exploitation require authentication or special privileges?

It depends on how New API is deployed. In many setups, any user who can submit prompts or data to the system may be able to influence the model output. The impact is highest when the affected UI is accessible to privileged users (such as administrators) whose sessions could be hijacked.

What is the safest general fix pattern for this issue?

The safest pattern is to treat all LLM-generated content as untrusted and ensure it is either: - Rendered as plain text with proper HTML escaping, or - Sanitized through a strict allowlist-based HTML/Markdown sanitizer before being inserted into the DOM. Additionally, avoid direct use of APIs that bypass the framework's built-in escaping unless absolutely necessary and well-guarded.

Severity:

HIGH RISK

(7.6)

Reflected Cross-Site Scripting (CWE-79) in New API MarkdownRenderer Component

CVE-2026-25802

Published:

Feb 23, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Cross-Site Scripting (XSS)

CWE:

CWE-79

Impact:

Arbitrary JavaScript Execution in User Browser

Severity:

HIGH RISK

(7.6)

CVSS Version:

3.1

Vulnerability Type

Category:

Cross-Site Scripting (XSS)

CWE:

CWE-79

Impact:

Arbitrary JavaScript Execution in User Browser

Severity:

HIGH RISK

(7.6)

CVSS Version:

3.1

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355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Reflected Cross-Site Scripting (CWE-79) in New API MarkdownRenderer Component

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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